Effective nutritional strategies to mitigate enteric methane in dairy cattle

Methane is a potent greenhouse gas that traps energy far more efficiently than carbon dioxide. Reduction of methane emissions is thus essential to slowing climate change, and livestock are a major source of these emissions. Dr. Phil Cardoso talks with Dr. Alex Hristov of Penn State University about nutritional strategies for mitigating production of methane by dairy cattle. They discuss the effectiveness of several different feed additives at reducing methane emissions and their effects on DMI and milk production.


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Links to papers and other sources mentioned in this video 
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Hristov et al. 2022. Symposium review: Effective nutritional strategies to mitigate enteric methane in dairy cattle.
DOI: 10.3168/jds.2021-21398
https://www.journalofdairyscience.org/article/S0022-0302(22)00392-7/fulltext

International Methane Emissions Observatory (IMEO) 
https://www.unep.org/explore-topics/energy/what-we-do/imeo

Joint EU-US Statement on the Global Methane Pledge 
https://ec.europa.eu/commission/presscorner/detail/en/statement_21_5206

Hristov et al. 2015, An inhibitor persistently decreased enteric methane emission from dairy cows with no negative effect on milk production.
DOI: 10.1073/pnas.1504124112
https://www.pnas.org/doi/10.1073/pnas.1504124112

73rd Annual Meeting of EAAP. Porto, Portugal, September 5–9 2022.
https://eaap2022.org/docs/Final_Programme_EAAP22.pdf#page=53

Arndt et al. 2022, Full adoption of the most effective strategies to mitigate methane emissions by ruminants can help meet the 1.5 °C target by 2030 but not 2050.
DOI: 10.1073/pnas.2111294119
https://www.pnas.org/doi/10.1073/pnas.2111294119

Duin et al. 2016, Mode of action uncovered for the specific reduction of methane emissions from ruminants by the small molecule 3-nitrooxypropanol.
DOI: 10.1073/pnas.1600298113

Pitta et al. 2022, The effect of 3-nitrooxypropanol, a potent methane inhibitor, on ruminal microbial gene expression profiles in dairy cows.
DOI: 10.1186/s40168-022-01341-9
https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-022-01341-9

FAO-IPCC Expert Meeting on Climate Change, Land Use and Food Security. Rome, Italy January 23–25 2017.
https://www.fao.org/3/i7068e/i7068e.pdf

Hristov and Melgar 2020, Short communication: Relationship of dry matter intake with enteric methane emission measured with the GreenFeed system in dairy cows receiving a diet without or with 3-nitrooxypropanol.
DOI: 10.1017/S1751731120001731
https://www.sciencedirect.com/science/article/pii/S1751731120001731?via%3Dihub

https://globalresearchalliance.org/research/livestock/networks/feed-nutrition-network/

Hammond et al. 2016, Review of current in vivo measurement techniques for quantifying enteric methane emission from ruminants.
DOI: 10.1016/j.anifeedsci.2016.05.018
https://www.sciencedirect.com/science/article/abs/pii/S0377840116302048

Roque et al. 2019, Inclusion of Asparagopsis armata in lactating dairy cows’ diet reduces enteric methane emission by over 50 percent.
https://www.sciencedirect.com/science/article/abs/pii/S0959652619321559
DOI: 10.1016/j.jclepro.2019.06.193

Martins et al. 2022, Effects of feeding method and frequency on lactational
performance and enteric methane emission in dairy cows.
https://www.adsa.org/Portals/0/SiteContent/Docs/Meetings/2022ADSA/Abst